Carburetor



March 31, 1931. Q FAUSER JR 1,798,461

CARBURETOR Filed Oct. 28, 1927 2 Sheets-Sheet 2 s1 50 4 4, flgNXZiMiI/UEF I F512. I W W AT! CIENEYE Patented Mar. 31, 1931 UNITED STATES OSCARFAUSER, JR., OF PEORIA, ILLINOIS onnnunn'ron Application filed October28, 1927. Serial No. 229,351.

This invention relates to carburetors.

One of the objects of the invention is in the provision of a carburetorfor internal combustion engines, said carburetor being provided withsuch structural arrangement between the float chamber and the intake asto insure a more efficient mixing of the gasoline and air prior to theentrance of said mixture to the intake.

Another object is in the provision of mechanism disposed betweenthefloat chamber and the intake, of a carburetor, such as will greatlyincrease the mixing of the gasoline and air, thereby permitting theintake to induce thereinto a drier and therefore more readilycombustible fuel mixture, the result being to greatly increase theefficiency of the internal combustion engine to which the carburetor isattached.

Still another object is in the provision of a simple atomizing device,which is disposed in connection with the conventional intake of aninternal combustion engine in a manner to supply thereinto a highlyefficient, combustible mixture.

A further object is in the provision of a means for atomizing gasolineprior to its induction into the intake, said atomizing means comprisinga spiral member for whirling the mixture of gas and air, the resultingspray being projected through ports in said chamher and finally into asubstantially similar chamber in the intake, said chamber having aplurality of ports from which the spray is induced into a venturidisposed in the intake.

A still further object is in the provision of means for atomizing thefuel used in an internal combustion motor, said atomizing meanscomprising mechanism for whirling the gas and air in a chamber fromwhich the resultant spray passes through a plurality of ports to theintake, there being provided a further re-atomizing chamber disposed inthe venturi in the intake.

Other objects will appear in the following specification, taken inconnection with the annexed drawings, in which- Fig. 1 is a plan view ofthe carburetor;

Fig. 2 is one end elevation thereof;

Fig. 3 is a side elevation of the same;

Fig. 4 is another end elevation of the carburetor;

Fig. 5 is a cross-sectional view, showing in detail the float chamberand the intake mechanism;

Fig. 6 is an enlarged detail, in section, showing a portion of the floatmechanism;

Fig. 7 is a sectional view, taken on the line 77 of Fig. 6;

Fig. 8 is a vertical sectional View, showing in detail my specialatomizing or vaporizing mechanism Fig. 9 is a further detail, insection, of my atomizing mechanism; and

Fig. 10 is a detail of the atomizing chamber disposed in the venturilocated in the intake.

Before referring specifically to the drawings, it might be stated thatthe novelty in the structure disclosed herein lies particularly in themechanism and manner of handling the gasoline, hereafter referred to asfuel, prior to its induction into the intake.

Carburetors are of such well known construction as is thought to obviatehe necessity of describing the more general features in detail, and as amatter of fact, the novel features to be claimed herein, although shownin connection with a rather conventional carburetor structure, mightwell be used in any other type of carburetor or fuel mixing device.

As stated in the objects of the invention, applicant herein has providedmechanism for more thoroughly mixing the fuel and fuel prior to theprojection of the atomized mixture into the intake of an internalcombustion engine. Inasmuch as the present carburetor might be attachedto any of the many types of internal combustion engines, such portionhas not been shown.

Referring to the drawings, there is shown a conventional float chamber10, having a drain plug 11 at its lower end, by which any collection ofwater or extraneous particles lodging in the float chamber may beextracted by removal of said plug. A cover 12 for the float chamber hasan upwardly projecting portion 13, which forms a valve seat 14interiorly thereof. A vertically slidable plunger carried in saidportion 18 is capable of seated or unseated relationship with the seat14 in a manner to permit passage of gasoline into the float chamber froma gasoline intalze pipe 16. Control of the plunger 15 is by a lever 17pivoted, as at 18. A bracket 19, socured, as at 20, to the under side ofthe cover, controls the downward movement of lever 17. A conventionalfloat chamber is shown at 21, the same having an upwardly projectingstem 22, which is adapted to contact the un der side of the lever 17'ith the result that up and down movement of the float controls theentrance of gasoline into the float chamber.

As stated previously, the heretofore described mechanism is entirelyconventional, so far as carbureting devices is concerned and merelydescribes one of the conventional manners of maintaining a supply offuel in the carburoting device.

In the present device, an intake member of rather conventional form isshown at 23. Disposed in said intake a pivoted valve member 24,controlling the amount of air that may be induced therethrough. Thisvalve is pivoted, as at 25, in the in ake, and is controlled by anexteriorly disposed lever 26, which in normal operation of an internalcombustion engine is manually controlled by the operator to increase ordecrease the speed of the engine.

There now follows a description of applicants atomizing mechanism,which. more of ficiently accomplishes the fuel mixture prior ed at 28into an inwardly cast portion 29,

chamber will completely surround the lower 1 thereof, the exit of thecompletely atomized 9 of the drawings, the same tioned member 27 is asmall plu 3d a -ertured,

member 27. A cover member 38 is threaced cover the opening for thegasoline and therementioned gasoline atomizing means.

member 27, the same being inserted as may manner to substantially engagethe upper to its induction into the intake. This mechanism comprises aportion 27, whic i is thread which forms a part of the float chamber, itbeing apparent that the gasoline in the float end 30 of said member 27.This member 27 comprises an atom zmg chamber interiormixture from saidchamber being through a plurality of apertures shown perhaps mostclearly in F12. being designated 32. Threaded interiorly, as at 33, inthe lower end of the before-menas at 35, to permit the entrance ofgasohns from the float chamber into the inside of to the lower end ofthe member 27 in suc i manner that a screen portion 37 thereof wil.

fore prevent the entrance of dirt particles or other extraneous matterinto the hereafter Still another and larger plug 38 has a threadedrelationship. as at 39, with the be readily seen. from above. This plug38 has its lower end 40 tapered at l1 in a end of the small plug 34.This plug 38 is apertured throughout, as may be clearly seen, saidaperture being designated 42. A removable small plug 43 is inserted inthe upper end of said plug 38, the same also being apertured to permitthe entrance of air into the beforeanentioned opening 42. It is apparentfrom the above description that gasoline enters the smaller plug 34 andair enters the plug 38. the same meeting in the small open space betweenthe tapered end of the plug 38 and the upper end of small plug 34:. Thisis the first mixture of the air and fuel, operation of the internalcombustion inducing air through the opening 42 in the plug 38 and theupward flow of gasoline through the screen portion 37 and opening in theplug 34. The resulting mixture passes upwardly along the sides of thelower end of the member 38 until same reaches a spiral portion 44, thesame forming a part of the plug 38. This spiral operates to whirl thebefore-mentioned mixture of gasoline and air and therefore more compltely mix same. This whirling of the gasoline and air creates an atomizedmixture of gasoline and air within the atomizing chamber 31, the samebeing formed between the member 27 and the plug 88. This atomizingchamber, as previously described, has a series of perforations, whichpermits the exit of the atomized fuel mixture through an outlet 45 andthence through a passageway 46 into a re-atomizing chamber, later to bedescribed.

A conventional needle valve, shown at 4:7, has its pointed end 48capable of projection between the passageways 45 and 46 in a manner tocontrol and vary the air and fuel mixture as may be desired. This needlevalve is a conventional regulating member and has a threadedrelationship, as at 49, with the carburetor feed portion 50. The outerend of the needle Valve has a manually controllable portion 51 and aspring tensioned frictionally engage-able member 52, which holds saidneedle valve in the set position. The fuel mixture passageway 46 carriesthe atomized fuel mixture into a specially formed venturi 53 which issecured within the intake by means of the set screw 5- This venturi hasa re-atomizing chamber 55, into which the fuel mixture from thepassageway 46 is projected. This atomizing chamber is formedsubstantially the same as the previously described atomizing chamber 31,inasmuch as same has a plurality of apertures at 56 which lead into theventuri. It is therefore found that the fuel mixture is not onlyinitially atomized by means of the spiral portion but also there is asubstantial re-atomizing of the fuel mixture in the second chamber theresulting mixture passing through apertures 56 into the intake.

Due to the disposal of the venturi within the intake, it is apparentthat this fuel mixture is accelerated by the use of the venturi.

The fuel mixing arrangement, which has 110w been described, can be usedonly when the internal combustion engine has attained more than anidling speed; in other words, is used only when the valve 24 is openedin a manner to induce the flow of atomized fuel mixture into theventuri. In order to take care of an idling speed when the valve 24 isnot opened, there is provided an additional passageway 57 from theneedle valve chambar, the same leading to a plug 58 which is screwthreaded, as at 59, in the intake at a point just above the valve 24.This plug forms a smaller atomizing chamber of sub stantially the samegeneral formation as those previously described, in that the plug isapertured, as at 60, to permit the entrance of air internally thereof,the same passing through apertures 61 into a small chamber, as

62, just prior to the projection of the fuel mixture through the opening63 which leads into the intake at a point above the valve 24.

It is apparent from the above description, that when the internalcombustion engine is at an idling speed, the fuel mixture will be drawnfrom this chamber and that no fuel mixture will be projected from thechamber 55, the same forming a part of the venturi 53. However, at thistime the initial fuel atomizing mechanism is in operation and isefficiently mixing the gasoline and air. When the mot-or attains morethan an idling speed, the valve 24 opens and fuel is then induced fromthe atomizing chamber 55 in the venturi.

With respect to the operation of the carburetor, it is apparent that thegasoline and air are whirled by the spiral in a manner to atomize same,and that only a thoroughly atomizel mixture can pass through theplurality of apertures 32 in the first atomizing chamber. The control ofthe fluid mixture by the needle valve is conventional, but the formationof a second atomizing chamber in the venturi and the passage of theatomized mixture through a plurality of apertures in said venturi alsopermits an even distribution of fuel mixture into the intake, as well asa IIIlXbLlI'G which is completely broken up and in substantially drycondition, this formation of a dry fuel mixture being highly desirable,in many instances there being an attempt to obtain same by pre-heatingor intake-heating devices, the same not being necessary with the presentcharacter of carbureting device.

In view of the above description, and due to he fact that internalcombustion motors are of such conventional structure as to obviate thenecessity of describin same, the present description is thoughtsufiicient as far as the operation of the carburetor is concerned.

W hat I claim is: 1. In a carburetor having a Venturi tube, an atomizingdevice comprising a removable plug having an atomizing chamber therein,

apertures in said chamber, a second plug within said first named plugand having a passageway therein, a second passageway between said plugsconnected to said first named passageway and said chamber, a thirdpassageway leading to the float chamber of the carburetor and connectedto said first and secon d passageways, means in said second namedpassageway to whirl a mixture of fuel and air into said atomizingchamber and connections from said apertures to the Venturi tube of thecarburetor.

2. An atomizer for a carburetor having a Vcnturi tube, comprising apassageway leading upward from the float chamber of the carburetor, asecond passageway connected to said first named passageway and leadingdownward from the outside of the carburetor, a third passagewayconnected to both said first and second named passageways at the pointof connection between them, said last named passageway encircling saidsecond named passageway, a plug, a chamber therein connected to saidlast named passageway, a spiral member in said last named passageway towhirl a mixture of air and fuel into said last named chamber to at-omizethe same, and connections from said last named chamber to the Venturitube of the carburetor.

3. An atomizer for carburetors comprising a passageway leading upwardfrom the float chamber of the carburetor, a second passageway connectedto said first named passageway and leading downward from the outside ofthe carburetor, a third passageway connected to both said first andsecond named passageways at the point of connection between them, saidlast named passageway encircling said second named passageway, a plug, achamber therein connected to said last named passageway, a spiral memberin said last named passageway to whirl a mixture of air and fuel intosaid last named chamber to atomize the same.

t. In a carburetor having a Venturi tube, an atomizing device comprisinga removable plug having an atomizing chamber therein, apertures in saidchamber, a second plug within said first named plug and having apassageway therein, a second passageway be tween said plugs connected tosaid first named passageway and said chamber, a third passageway leadingto the float chamber of the carburetor and connected to said first andsecond passageways, means in said second named passageway to whirl amixture of fuel and air into said atomizing chamber, connections fromsaid apertures to the Venturi tube of the carburetor, and a screenmember positioned on the end of the first named plug across thepassageway leading to the float chamber of the carburetor.

In testimony whereof, I have hereunto affixed my signature.

OSCAR FAUSER, JR.

